ToRTULACEiE.] 253 [MolUa. 



Tortula tortuosa Ehrh. Beitr. vii. loi (1792). Schrad. Spic. fl. germ. 64 (1794). Brid. 

 Muse. rec. II, P. I, i8g (1798), Sp. muse. I, 264 (1806). Swartz Muse. suec. 39 

 (1798). RoEHL. Moosg. deutsch. 391 (1800). Roth Fl. germ, iii, P. I, 202 (1800). 

 Hedw. Sp. muse. 124 (1801). Rich. Fl. amer. bor. ii, 295 (1803). Smith Fl. brit. iii, 

 1258 (1806) ; Eng. bot. t. 1708. Turn. Muse. hib. 52 (1804). Hedw. fil. in Web. 

 MoHR Beytr. i, 121, t. 5 (1805). P. Beauv. Prodr. 93 (1805). Wahlen. Fl. lapp. 317 

 (1812) ; Fl. carpat. 358 (1814). Hook. Tayl. Muse. brit. 32, t. 12 (1818). Gray Nat. 

 arr. br. pi. i, 724 (1821). Hook. Br. fl. ii, 46 (1833). De Not. in Mem. aee. Torin. xl, 

 322 (1838), Syllab. 182 (1838)', Muse. ital. I, 66, t. 39 (1862), Epil. bri. ital. 556 (1869). 

 WiLS. Bry. brit. 125, t. 12 (1855). Berk. Handb. br. m. 255 (1863). Lindb. de Tort. 

 253 (1864). HoBK. Syn. Br. m. 72 (1873). 



Barbula tortuosa Web. Mohr Bot. Taseh. 205 (1807). Schwaeg. Suppl. I, P. I, 129, t. 

 33(1811). VoiT Muse. herb. 53 (1812). Roehl. Deutsch. fl. iii, 80 (1813). Mart. Fl. 

 cr. erl. 88 (1817). Brid. Mant. muse. 95 (i8ig), Bry. univ. i, 574 (1826). Funck Moost. 

 23, t. 15 (1821). ScHULTZ Recens. Barb, et Syntr. 219, t. 34, f. 28 (1S23). Hueben. 

 Muse. germ. 333 (1833). Br. Schimp. Bry. eur. fase. 13 — 15, p. 26, t. 13 (1842). 

 Rabenh. Deutseh. kr. fl. ii, S. 3, 107 {1848). C. Muell. Synops.i, 601 (1849). Schimp. 

 Synops. 179 (i860), 2 ed. 218. Milde Bry. siles. 123 (i86g). HusN, Mouss. nord- 

 ouest 84 (1873). Juratz. Laubm. oesterr-ung. 122 (1882). Lesq. James Mosses N. 

 Amer. 129 (1884). 



Dioicous ; in large soft swollen pulvinate tufts, fine yellow-green 

 above, fuscous below. Stems tall i — 4 in. high, dichotomous fastigiate, 

 tomentoso-radiculose at base. Leaves densely crowded, ilexuoso-patent 

 when moist, circinato-crispate when dry, from a thin pale ovate base, 

 longly lineal-lanceolate subulate, undulate, nerve strong, excurrent in a 

 short subdenticulate point ; upper cells minute, obscure, basal hyaline 

 narrow and elongated, running obliquely upward and outward to the 

 margin. Perich. bracts erect, semivaginant, narrowly acuminate, 

 whitish ; caps, on an elongated red seta, erect, from ovate oblongo- 

 cylindric, subregular or more or less arcuate, leptodermous, at first 

 greenish-yellow, afterwards pale brown, when old dark brown ; lid 

 elongato-conic, subulate, as long as caps, or shorter, not annulate, 

 peristome red, very slender, scabrous, several times convolute. Male 

 plant smaller, with shorter lanceolate leaves, infl. terminal, bracts 

 ovate, concave, suddenly lanceolate, nerved. 



Hab. — Rocks, especially calcareous, but also on sandstone and on banks and 

 walls. Fr. 7. 



Var. j8. dicranoidea Ferg. MSS. 



Stems tall, compactly tufted 3 — 6 in. high, densely radiculose nearly to 

 the apex ; leaves subsecund, firm, rigid, the terminal collected into a cuspidate 

 tuft. 

 Hab. — M. Uam, Glen Shee, &c. {Fergusson 1879) ! ! 



Var. y. angustifolia {Juratz.) , 



Plants shorter, more slender, glaucescent ; leaves from a longish base, 

 very narrowly lanceolate-subulate, the hyaline cells extending far up the 

 basal margin. 



Syn. — Barbula tortuosa Var. p. angustifolia Juratz. Laubm. oesferr.-ung. 123. 



Hab. — Winnatts, Derby (T. Rogers 1881) ! ! Wall west of Bryanford, Co. 

 Down {Rev. H. W. Lett 1885) '. ! 



